package com.atguigu.gulimall.ssoclient.controller;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.List;

@Controller
public class HelloController {

    @Value("${sso.server.url}")
    String ssoServerUrl;

    /**
     * 无需登录就可访问
     * @return
     */
    @GetMapping("/hello")
    @ResponseBody
    public String hello() {
        return "hello";
    }

    /**
     * 感知这次是在sso-server登录成功后才跳转回来的
     * @param model
     * @param session
     * @return
     */
    @GetMapping("/employees")
    public String employees(Model model, HttpSession session, @RequestParam(value = "token", required = false) String token) {
        if (!StringUtils.isEmpty(token)) {
            // 是从sso-server登录了之后跳回来
            // TODO 1、去sso-server获取当前token真正对应的用户信息
            RestTemplate restTemplate = new RestTemplate();
            ResponseEntity<String> forEntity = restTemplate.getForEntity("http://ssoserver.com:8080/userInfo?token=" + token, String.class);
            String body = forEntity.getBody();
            session.setAttribute("loginUser", body);
        }
        Object loginUser = session.getAttribute("loginUser");
        if (loginUser == null) {
            // 没登录，跳转到登录服务器进行登录
            // 跳转过去以后，使用url上的查询参数标识我们自己是哪个页面
            return "redirect:" + this.ssoServerUrl + "?redirect_url=http://client1.com:8081/employees";
        } else {
            List<String> emps = new ArrayList<>();
            emps.add("张三");
            emps.add("李四");

            model.addAttribute("emps", emps);
            return "list";
        }
    }
}
